Selfish. I think of the word as a childish insult reserved for someone who won’t share their crayons or who takes extra cookies during snack time. For me, it is an insult that ranks up there with “poopyhead” (an all-encompassing insult). However, “selfish” particularly stings because it directly attacks one’s character, saying they are, God forbid, “not nice.” Keep in mind that this was my opinion on insults back when the most worrisome aspect o…